Valve structure in a fluid motor



March 24, 19 59 F. A. KROHM 2,

VALVE STRUCTURE IN A FLUID MOTOR Original Filed May 11, 1949 v INVENTOR.I FRED A. Mao/4M WAV/W United States Patent VALVE STRUCTURE IN A FLUIDMOTOR Fred A. Krohm, Hobart, Ind., assignor, by mesne assign- 311311228,to The Anderson Company, a corporation of Original application May 11,1949, Serial No. 92,634. Divided and this application October 11, 1954,Serial No. 461,393

6 Claims. (Cl. 137-624) This invention relates generally to power units,and more particularly, has to do with valve structure prefera'blyadapted for use with a windshield wiper motor of the fluid type.

This application is a division of my copending application Serial No.92,634 filed May 11, 1949, now abandoned.

An object of the invention is to provide a primary valve seal and avalve embodying improved principles of design and construction wherebyit may be caused to automatically adjust and seal itself with respect tothe seat, including means extending through the valve into the body fordetachably holding the valve in place.

A significant object of the invention is to provide a primary valve anda control assembly with unique means for operatively connecting thevalve with the control assembly.

Another object of the invention is to provide a setup whereby the uniquemeans employed for operatively connecting the valve and control assemblytogether may be manipulated to .either of two positions forpredetermining the rotational range of the primary valve.

Other objects and advantages of the invention will become apparent afterthe description hereinafter set forth is considered in conjunction withthe drawings annexed hereto.

Referring to the drawings, wherein like parts are designated by the samenumerals,

Figure 1 is a perspective view of the motor assembly embodying theinvention;

Figure 2 is a top view of'a part of the motor assembly illustrating aneutral position of the valve therein; and

Figure 3 is a view showing the primary valve assembled with an operatinglever.

The motor structure exemplified in the drawings includes, among otherthings, a housing 1, a cover 2, a

mounting frame 3 permanentlysecured to the housing, a

valve body 4 detachably secured to the'cover, a primary or throttlevalve 5 carried by the valve body, a mechanism' or valving deviceactuated by a driving shaft 7 for controlling a secondary valve,and acontrol unit 9 operatively connected to the primary valve.

"ice

source of suction may be connected to either of the nipples depending onthe installation. A detachable rubber cap may be utilized to cover thenipple which is not used.

The block 4 is provided with an L-shaped vertical passage, the upper endof which communicates with the circular recess 26 at a port 36 equallyspaced from the vertical passages 30, and its lower end connects with acenter hole provided in a mounting plate which supports the valvingdevice. The block is also provided with a generally Z-shaped passage 39,one end of which communicates with the circular recess 26 at port 40 andits other end communicates with the chamber in the motor chamber. Apassageway 42, similar to and aligned with passageway 39, communicateswith the circular recess 26 at port 43 and the motor chamber. A vane(not shown) is carried by the shaft 7 for oscillation in the chamber. Itwill be noted that the aligned passages 29 are arranged substantiallyparallel-to the passages 39 and 42.

The valve block is further provided with a passageway 45, one end ofwhich communicates with the circular recess 26 at a port 46, anditsother end with an aperture provided in the mounting plate. Apassageway 48, similar to passageway 45, communicates with the throttlevalve recess at a port 49 and an aperture provided in the plate. TheL-shaped and Z-shaped passages, various apertures, including themounting plate, valving device and secondary valve, are fullyexemplified and described in my application above referred to.

The primary valve 5 may be constructed in various ways but as hereinillustrated, is preferably made round and of neoprene or some otherdesirable resilient material that will tendto automatically adjust andseal itselfwith respect to its seat. A metal lever having a round flatportion 101 is interlocked with the valve and includes an oflset tab102, the latter being provided with an opening which is adapted toreceive a connector 103 attached to the inner end of helical flexiblecontrol member 104 constituting a component of the manual control unit9. A plate 105 overlies the valve 5 and engages the valve block andholds the valve and lever assembled in the valve recess 26. A pivotscrew 106 extends through plate 105, lever and valve and into the valveblock. The interlock between the lever and valve is preferablyaccomplished by providing the upper side of the valve with a pluralityof raised or elevated portions, including a round central portion 107having diametrically disposed radial portions 108 and 109 andcorresponding arcuate portions 110 and 111, all of such portions beingreceived in clearance openings in the lever having shapes correspondingto these portions.

The throttle valve 5 is provided with a tubular center core portion .112.and its underside with an annular. re.-

The upper part of the valve block is provided with a circularrecess 26,which rotatably receives the throttle or primary'vaIve-S above referredto. As will be pointed out hereinafter, the" valve block is providedwith a plurality of passages which communicate with the recess 26 and achamber in the motor and the secondary valve.

cess 113 surrounding the core. When the-motor is in operating conditionas exemplified in Figures2 and}, the passages 29 leading to the vacuumsupply meansand passage 35 leading to the. secondary valvewill be placedin communication with the annular recess 113 through ports 30 and 36respectively. The valve is further pro vided with a pair of separatecorresponding arcuate recesses 114 and 115 disposed substantiallyconcentric to the annular recess 113. Attention is directed to the factthat the annular recess is provided with diametrically disposedconnecting recesses 116 and 117, which will be described more in detailsubsequently. The annular recess is at all times in communication withthe passages 29 leading to the vacuum means. Attention is furtherdirected to the fact that these recesses substantially correspond inshape and size with the raised or elevated portions 107 through 111provided on the upper surface of the resilient primary valve 5.

The opening in the tab 102 includes a slot so that a reduced portion ofthe connector 103 may be received in 3 the slot and the tab 102 will beheld between abutments provided on the connector. With this arrangement,a detachable easily workable coupling or connection is establishedbetween the flexible-control member 104 and the tab 102 of the primaryvalve 5. The connector 103 is preferably of a diameter not in excess ofthe diameter of the flexible member 104 in order that the connector willpass through threaded apertures formed in the legs 130 of a fitting 131secured to the valve block 4 by a screw 132. The flexible memberthreadedly engages the threaded apertures and is of such a characterthat a knob adjacent its outer end may be disposed in any location onthe instrument panel desired for convenient operation. Attention isdirected to the fact that the valve block is provided with a threadedopening 134 so that the fitting 131 may be connected to another part ofthe block depending on which of the nipples 31 and 32 is connected tothe vacuum means.

The manual control unit 9 provides means whereby the throttle or primaryvalve 5 may be accurately controlled to govern the operation of themotor. The operation of the motor and parking features thereof arecomparatively simple and will now be described.

To operate the motor, the throttle valve 5 is rotated to the positionillustrated in Figure 2 by the flexible member 104 to connect theannular recess 113, which is at all times in communication with thevacuum, with port 36 through recess 117, port 36 leading to a hole inthe mounting plate through the L-shaped passage, thereby connecting asecondary valve of the valving device with hole and aperture in themounting plate, this aperture 47 with port 46 through passageway 45,port 46 to port 40 through arcuate recess 114 in the valve, and port 40to one of the chamber ports through passageway 39, to establish athrough line of communication from passage 29 to the secondary valve andthe chamber port 41 to cause the vane, previously in a parked positionto be sucked or pivoted in one direction. The moment the secondary valveis moved over one of the apertures in the mounting plate, the otherchamber port is placed in communication with the vacuum to cause thevane to oscillate in the opposite direction and just before the vanecompletes its stroke the valving device will cause the secondary valveto move over another of the apertures in the mounting plate so that thevacuum will pivot the vane back to said one direction through the agencyof the other passages and ports above described. In other words, and asspecifically described in the application above referred to, thesecondary valve of the valving device is moved relative to variousapertures in the mounting plate to control and effect oscillation of thevane.

- When the throttle valve is in the position illustrated in Figure 2,the vane will be caused to automatically oscillate within the chamber toactuate the drive shaft 7. It is of course to be understood, that whenthe valve is inthe position just referred to, the shaft will beoscillating at its maximum speed. To reduce the rate of oscillation, itis merely necessary tomove the throttle valve 5 in a direction to reducethe strength of the suction at the chamber ports. The recess 116communicating with recess 113 is preferably V-shaped so that the passageof air between recess 113 and either of the ports 40 and 43 leading topassages 39 and 42 may be easily regulated, and so that a wiper arm andblade assembly connected to the shaft 7 may be eased or slowly moved tothe desired parking position.

Having thus described my invention, it is obvious that variousmodifications may be made in the same without departing from the spiritof the invention, and, therefore, I do not wish to be understood aslimiting myself to the exact form, construction, arrangement, andcombinations of parts herein shown and claims.

I claim:

1. A resilient valve member, a recess provided adjacent one side of themember for operatively connecting and disconnecting passages, meanssubstantially corresponding to the shape of the recess and reenforcingit extending from its opposite side, and a lever provided with anopening receiving said extending means for interlocking the valve memberand lever.

2. Valve structure comprising a body provided with a seat with passagesleading to the seat, a resilient valve disposed on the seat and providedwith a recess for connection and disconnection with the passages, saidvalve having a raised portion reenforcing the recess, a lever having aportion interengaged with the raised portion of the valve and alsohaving a portion offset from the valve for attachment to a control foroperating the valve, and fastening means extending through the valveinto the body for holding the valve on the seat.

3. The structure defined inclaim 2, including the provision of meansintegral with the body engageable by the offset portion of the lever fordetermining the travel limits of the valve and lever, and in which thefastening means also extends through the lever for holding the lever andvalve assembled on the seat.

4. Valve structure comprising a body provided with a threaded apertureand a round recess with passages leading to the base of the recess, asubstantially flat resilient valve rotatable in the recess and providedwith a recess in one side thereof for connecting the passages, saidvalve also having an opposite side provided with an abutment extendingfrom the recess and reenforcing it, a member having an opening receivingsaid abutment to interconnect the valve and member and also having aportion for attachment to a control for operating the valve, andfastening means extending through the valve and lever having a threadedend engaging the threaded aperture for holding the valve in the recessand the lever assembled with the valve.

5. A valve assembly comprising a substantially flat valve provided witha recess of a predetermined configuration in one side thereof, the otherside of the valve being provided with a raised portion defining the basewall of the recess, and an operating lever overlying the valve andprovided with an opening receiving the raised portion, said raisedportion and said opening substantially conforming to the configurationof the recess.

6. Valve structure comprising a body having a round recess with anannular wall extending from the recess, said wall being provided with anopening, passages intersecting the base of the recess, a resilient valverotatable in the recess and formed to connect and disconnect the passsages, a lever provided with a portion attached to the valve and aradial portion extending through the opening, a control assembly, a pairof individual means carried by the body, and a fitting conneetible toeither of said means for supporting the control assembly in a mannerwhereby the latter can be attached to the radial portion of the l v ineither of two positions.

References Citedintheflleofthlspatent UNITED STATES PATENTS describedand defined in the 711,755 Blake Oct. 21, 1902 1,142,910 Putnam June 15,1915 1,790,705 Heywood Feb. 3, 1931 2,108,182 Searle Feb. 15, 19382,146,983 Pick Feb. 14, 1939 2,271,331 Elliott Ian. 27, 1942 2,351,732Almond Jan. 20, 1944 2,564,445 Parsons Aug. 14, 1951 2,706,532 RingoApr. 19, 1955

